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Free · Browser-based · No sign up

JSON Formatter & Validator

Format, validate, minify and inspect JSON instantly.

Local processingYour input stays hereSimple controls

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Input JSON
0 characters · 0 bytes
Output JSON
Your result will appear here.

Up to 1,000,000 input characters (1 MB uploads) and 100 nesting levels. Ctrl/⌘ + Enter processes your input. Large previews are truncated; downloads contain the full result.

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Processed locally in your browser

Your input does not need to be uploaded to an EvryNest server. Nothing is saved automatically.

How It Works

  1. 1
    Paste JSON

    Enter JSON or upload a UTF-8 JSON file.

  2. 2
    Format and inspect

    Indent the data, sort keys or explore the collapsible tree.

  3. 3
    Copy or export

    Copy the formatted JSON or download the complete result.

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Frequently Asked Questions

How does JSON Formatter work?

Use Format for indentation, Minify for compact JSON, and Tree view to inspect nested objects.

Does this tool upload or save my input?

Core processing happens locally in this browser tab. Input and output are not sent to a processing server or stored automatically. Copy and download only occur when you request them.

What happens with large or invalid inputs?

Input limits and errors are shown in the workspace. JSON supports up to 1 MB and 100 nesting levels; large previews can be truncated while downloads retain the full result.